Diffusion of Water Nanodroplets on MoS$_{\mathrm{2}}$ Monolayer*

Diffusion of water (H$_{\mathrm{2}}$O) on the molybdenum disulfide (MoS$_{\mathrm{2}})$ surface has recently attracted a great deal of attention. We have performed molecular dynamics (MD) simulation to study the diffusion of water nanodroplets on a monolayer of MoS$_{\mathrm{2}}$. Our simulation reveals that water nanodroplets diffuse rapidly on the MoS$_{\mathrm{2}}$ monolayer and the diffusion coefficient is inversely proportional to the nanodroplet radius. We also find that the H$_{\mathrm{2}}$O molecular distribution at the H$_{\mathrm{2}}$O-MoS$_{\mathrm{2}}$ interface is akin to the MoS$_{\mathrm{2}}$ layered structure and that friction coefficients of nanodroplets are small at the MoS$_{\mathrm{2}}$ surface.